Today stator impregnation machines are in great demand in the motor manufacturing industry. Initially developed within late 70s, these machines were manufactured to serve a wide range of electric motor manufacturers especially in sectors like servo, industrial alternator, aerospace, induction, fractional, and brush / brushless universal and stepper magnetic generators. One of the most popular methods in the sector today is trickle impregnation which is used for rotors and stators.With the trickle impregnation method, the windings of stator and armature components are coated with epoxy resin. The procedure starts with preheating of windings and dispensing a calculated amount of plastic resin. This is then heated to a certain temperature in order to “cure” the resin.
Manufacturing involves positioning and fixing of components horizontally on to chucks get been auto-centring. The chucks make your components rotate continuously on its central axis as they’re carried through the different steps of trickle impregnation process. The process includes preheating of components, trickling of epoxy resin, gelation and polymerization to cure the resin and finally cooling. The rotation speed depends on factors like size of component, process requirements etc. The speed plays an important role as that is what decides good penetration of resin. The whole process is controlled electronically. The phases of impregnator trickling and gelation play a crucial role and hence special attention has to gain to this process.
The area of impregnation is made of many tricking station that has series of drippers aligned strategically on the areas to be impregnated for accuracy. There are many pumps that force the flow of resin with the drippers. The fundamental principle of application is through capillary principle. The stator impregnation machines are designed for accurate control while impregnating the resin in comparison to its volume, rotation speed of parts, time and local climate. This affords maximum accuracy of resin application and ensuring optimum absorption. The capillary principle also ensures least wastage of resin during the trickle impregnation process.
The method of trickling is generally used in all the products wherein thermodynamic stress is important. The main advantages of solar energy collection system are high quality impregnation, no rework required after process completion, extremely high bond strength, high productivity and shorter processing time. The resins used can be without or with monomers.
The machines can be user friendly, flexible and environmental friendly with utmost importance being given to safety and standing. The design of the heating system ensures energy saving performance by the apparatus. PLC controls all the impregnation parameters. When different products will need to be impregnated, specific parameters can be set for every component on the basis of the following factors: